These types of oilers are used on the tractor to provide a daily lubrication point on certain assemblies. This particular oiler is mounted on the brake housing to lubricate the brake shaft bushing. Typically, the spring is damaged or the lid is missing. These oilers were, and still are, manufactured by GITS. We sell these oilers as a single or 2 pc offering(see GP-AA811R2PK). These oilers fit tractor models: A unstyled, A styled, B styled, G, R 80, 820, 830, 50, 60, 70, diesel 70, 620, 630